| 摘要 |
<p>An optical device having at least two optical parts which are adhered with each other by the use of an optically transparent adhesive layer, characterized in that the adhesive layer comprises a matrix containing at least one network forming metal atom selected from the group consisting of silicon, titanium, zirconium, aluminum and germanium and an oxygen atom, wherein at least a part of the network forming metal atom is bonded with another metal atom via a polyvalent hydrocarbon group having 2 to 8 carbon atoms and also is directly bonded to a monovalent hydrocarbon group such as an alkyl group, and wherein the contents of the metal atom, the polyvalent hydrocarbon group and the monovalent hydrocarbon group are adjusted so as for the refractive index of the adhesive layer to be analogous to those of the at least two optical parts.</p> |
